fix(sigma): update broken schema url (#4098)

Co-authored-by: sventec <[email protected]>

Author: sventec

src/api/json/catalog.json

@@ -4535,10 +4535,10 @@
       "url": "https://raw.githubusercontent.com/hardisgroupcom/sfdx-hardis/main/config/sfdx-hardis.jsonschema.json"
     },
     {
-      "name": "Sigma",
-      "description": "The Sigma detection format. Documentation: https://github.com/SigmaHQ/sigma-specification and https://github.com/SigmaHQ/sigma",
+      "name": "Sigma Detection Rule",
+      "description": "The Sigma detection rule format. Documentation: https://github.com/SigmaHQ/sigma-specification/blob/main/specification/sigma-rules-specification.md and https://github.com/SigmaHQ/sigma",
       "fileMatch": ["**/sigma/**/*.yml"],
-      "url": "https://raw.githubusercontent.com/SigmaHQ/sigma-specification/main/sigma-schema.json"
+      "url": "https://raw.githubusercontent.com/SigmaHQ/sigma-specification/main/json-schema/sigma-detection-rule-schema.json"
     },
     {
       "name": "Sigrid scope configuration file",